Hello all, I'd be greatly appreciative of some assistance... My computer has gotten into the habit of when I'm running applications that toll heavily on the video card, it shuts down completely without warning. When I'm rendering edited video in Sony Vegas 8.0, dealing with large files in Photoshop CS4, playing a graphic-heavy game like GTA:SA, or even if I have a couple browser tabs open with Flash content in them (which is odd, because as I understand it, in-browser Flash doesn't call on the video card), it turns off. The reason I suspect the video card or drivers is that those are the only instances when I have restarts, and only once I got a blue screen error message mentioning the video driver. I'm foolish and didn't make note of the exact error, and I only ran across it once. To make sure my bases are covered, recently I replaced the video card (GeForce 8800GTS 320mb from a 6600GT 128mb), uninstalling and then reinstalling the drivers when doing so; all the heatsinks and fans are clear of debris; I replaced the power supply, upping the wattage; the memory's been replaced recently; all virus scans end up clean; and I reformatted the main drive and reinstalled everything. Still the problems continue. Short of more drastic measures, I'm a little stumped. Specs: XP Home Edition, SP3 Intel Pentium 4 CPU 3.20 GHz 3.26 GHz 2.00 GB of RAM Nvidia GeForce 8800GTS, 320 mb Any help or point in the right direction would be really wonderful. Thanks!